"Today, I photographed two of the strongest people I've ever met," Moody wrote on Facebook. "One life is just beginning while the other is coming to an end."

Halstead has had two open heart surgeries, 18 stents, a stroke, a stroke, and several small heart attacks, leaving his heart at 10% function, according to a Facebook post by Brandy Gregware, Halstead's daughter and Kolbie's mother.

Kolbie, on the other hand, was born with a heart defect, chronic lung disease, kidney disease, and Down syndrome. He had his first open heart surgery at just 4 months old, and has spent 7 of his 10 months of life in a hospital.

"This past year has been extremely hard for our family because both have been in and out of the hospital and us not knowing if they would make it home," Gregware wrote.

But these trying experiences have brought the grandfather and his grandson closer than ever.

"I sit and watch my dad hold Kolbie for hours and they chat about their matching zippers," Gregware wrote. "You can definitely see the love and bond these two miracle fighters have in this picture!"